Shock-absorber.



H. DE ROSIER.

SHOCK ABSORBER.

APPLICATION FILED MAR. 31, 1911.

1,012,824. Patented Dec.26, 1911.

WITNESSES.-

INVENTOR,

ATTORNEY.

UNITED sTA'rEs ATENT ()FFICE.

HORACE DE ROSIER, 0F SPRINGFIEILD, MASSACHUSETTS, ASSIGNOR OF ONE-THIRDTO WILLIAM J. TOWER AND ONE-THIRD TO ROBERT E. LANE, BOTH OFSPRINGFIELD,

MASSACHUSETTS.

SHOCK-ABSORBER.

Patented Dec. 26, 1911.

Application filed March 31, 1911. Serial No. 618,250.

To all whom it may concern:

Be it known that I, HORACE DE Rosmn, a subject of the King of GreatBritain, reslding at Springfield, in the county of Hampden and State ofMassachusetts, have invented new and useful Improvements inShock-Absorbers, of which the following is a specification.

This invention relates to shock absorbers, so-called, for vehicles, andis especially adapted to self-propelled road vehicles.

The invention is fully illustrated in the accompanying drawing formingpart of this application, and clearly described and summarized in thespecification and in the claim appended thereto.

In the drawings forming part of this application,-Figure 1 is a sideelevation of a part of the frame of the vehicle and a part of one of itssprings showing the invention applied thereto in the usual way. Fig. 21s a cross-sectional view of the device on a somewhat enlarged scale,the plane of the section being on line 22, Fig. 1. Fig. 3 is a sectionalelevation of the device, the plane of the section being on the line 3-3,Fig. 2, and at right angles to the plane of the section in Fig. 2. Thescale in which Fig. 3 is drawn is the same as that of Fig. 2. Fig. l isa side elevation-of a part, of the device shown in Fig. 2 andillustrates means to lock the bolt shown in said Fig. 2 in its adjustedposition.

The object of the invention is to provide a shock-absorber of thefrictional type which shall be as simple as possible and of low cost ofmanufacture and in which, without secrificing compactness ofconstruction, the requisite frictional surface is provided wlth easilymanipulated compression devices, whereby the desired initial frictionalcontact between the parts may be attained, an important feature of theinvention residing in means to provide for an increase in the frictionalcontact between the parts when these parts are moved in one direction,and to reduce said frictional contact when the parts are moved in anopposite direction.

Referring to the drawings, a represents one end of the frame of avehicle, I) the spring; 0 the axle, and cl the clip for securing thespring to the axle, these parts being shown in a more or lessconventional manner.

Located respectively on the frame a and the clip cl, and in asubstantially vertical plane, are two supports for the shock absorber,as it is usually applied, these supports being indicated by e and f. Theshock absorber proper comprises two arms 9 and h of cast metal orstamping, each arm having at one end a disk integral therewith,-that onthe arm 9 being indicated by m and that on the arm h by is. The disk mon the arm 9 is provided with an annular peripheral flange 0 at rightangles to the plane of the disk, thus providing a cup-shaped recess toreceive the opposite disk. Each of these disks k and m has cast orstamped therein a hexagonal or other angularly shaped recess, mdicatedby the dotted lines 72, Fig. 3, and fitted into these recesses are twofiber-blocks each having a circular face, the diameter of which issubstantially equal to the diameter of the disk is. These blocks,indicated by g, have molded on the back side thereof the angularlyshaped projections 1" adapted to fit the recesses 79 in each of thedisks k and m. When these blocks are in position'they are, by the natureof their construction and applicati-on to the disks, heldv againstrotation.

On each of the disks 7c and m is formed a hub s through which acompression bolt 25 passes. This bolt passes freely through the disk 70,axially thereof, and also through the two blocks 9 and through a steeldisk 4; located between the two blocks 9, but the bolt is threaded intothe disk m. Opposite the ...threaded end of the bolt a head -w isprovided thereon, and a squared portion 00 on this head. When the bolt tis screwed into the disk m, the head to of the bolt will be drawn upagainst the disk 70 thereby pressing the two blocks 9 in the diskstogether against the opposite sides of the steel disk a. This bolt 23 isheld against rotation by the engagement of a bolt y located in a hole inthe hub of the disk k, and normally pushed outwardly by a spring 3, theend of the bolt engaging notches 4 cut in the periphery of the head toof the bolt. Therefore, to turn the bolt t, it is necessary to depressthe bolt 3 and to effect this conveniently said bolt is provided with ashort arm 5 extending therefrom through a slot in the hub all of whichis clearly shown in Fig. 2.

While the disk 4) has been spoken of as a steel disk, any metal disk canbe used, steel being preferred. v

The whole device is applied to a vehicle in the usual manner, the twoarms 9 and 72 having their extremities secured to the supports 6 and fby bolts 6 which will permit rotative movement of the arms relativethereto.

When this device is in operation, and any movement of the vehicle overthe road tends to compress the spring I) there will result ascissors-like movement of the two arms 9 and h, first toward each otherand then in bolt more tightly into the disk m and thereby bind moretightly the metal disk 41' between the two blocks q, to the end that thefrictional resistance of these contacting surfaces may be increased inproportion as the ends of the two arms 9 and h are separated. In thismanner, the more violent the rebound of the frame .a away from thespring I), the greater will be the degree of resistance to movementbetween the surfaces of the blocks 9 and the sides of the disk 'v,thisresistance being less when the frame a is returned to its normalposition relative to the spring and still further reduced, if the normaldistance between the frame and the spring is lessened.

Preferably, an oil-cup 7 is applied to the hub of the disk into whichthe screw-threaded end of the bolt t enters.

It will be observed that during the operation of this device, one of theblocks 9 will have a rotative movement in a direction con-- mainpractically stationary since the rota-.

tive force applied thereto by one of said blocks will be counteracted bya like force applied to the other side in an opposite direction. Thisobviates the necessity of securing the disk 12 non-rotatably on the boltor otherwise. The nature of the whole construction makes it possible torender it practically dustproof.

WVhat I claim, is

' A shock-absorber comprising a pair of arms, one end of each of whichis pivotally secured respectively to the frame and to the axle of thevehicle, a disk on the opposite end of both of said arms, each of saiddisks having in the opposed faces thereof recesses, a non-metallic blocknon-rotatably seated in each of said recesses, and a metal plate looselypositioned between said blocks, a compression bolt having a head thereonbearing against one of said disks and ex tending loosely therethrough,the opposite end of the bolt being screw-threaded into the other diskwhereby, by screwing up on said bolt, said metal plate may be clampedbetween said blocks, together with means coasting with said bolt,whereby the latter may be secured in any adjusted position to that oneof said disks through which it passes freely.

HORACE DE ROSIER. Witnesses:

K. I. CLEMoNs, HARRY W. BOWEN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

